Slow Cooker Philly Steak Sandwich Meat

"This makes a fantastic meat for Philly steak sandwiches. You can even use lower grade roasts and have this turn out. It also makes its own au jus if you like to dip as I do. To serve, sautee a sliced onion and sliced green pepper in a skillet. Put meat on a sub bun and top with onion and green pepper and Swiss or provolone cheese on top of that. Leave open-faced and broil until the cheese just starts to brown. The top of the bun will brown fast so don't broil that until the cheese has completely melted and just starts to show color."